Title :
On-chip voltage down converter for low-power digital system
Author :
Jou, Shyh-Jye ; Chen, Tsu-Lin
Author_Institution :
Dept. of Electr. Eng., Nat. Central Univ., Chung-Li, Taiwan
fDate :
5/1/1998 12:00:00 AM
Abstract :
An on-chip differential-amplifier-based DC-to-DC voltage down converter (VDC) is proposed. The converter is a negative feedback-type voltage follower with precise internal reference voltage generator and high current drive capability. VDC converts 5 V to lower voltage so that the internal circuits of the chip are used. In this paper, 3 V is used as a test vehicle. The proposed VDC has characteristics such as output voltage remains 3 V over a large load current range (0-100 mA) and temperature dependency of 3.2 mV/°C. The VDC chip was fabricated in a 0.8 μm single-poly-double-metal CMOS process and layout size is 690×210 μm2. The output voltage is stabilized within ±2.8% for supply voltage with ±10% variation achieved
Keywords :
CMOS digital integrated circuits; CMOS logic circuits; VLSI; circuit feedback; convertors; differential amplifiers; reference circuits; voltage control; 0 to 100 mA; 0.8 micron; 3 V; 5 V; DC-to-DC voltage down converter; differential-amplifier-based converter; high current drive capability; internal reference voltage generator; low-power digital system; negative feedback-type voltage follower; on-chip voltage down converter; single-poly-double-metal CMOS process; Circuits; DC-DC power converters; Differential amplifiers; Digital systems; Logic; MOS devices; Operational amplifiers; System-on-a-chip; Temperature dependence; Voltage;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
